問題詳情
1. A 68 kg man stands on a 27 kg bar, to which a cable is fixed at point B. The cable passes over two fixed pegswith coefficients of friction as indicated. The contact angles between the rope and pegs are 90. You many treatthe cable the same as you would treat a flat belt. Assume the normal force exerted by the man on the bar actsdownward through point A.
【題組】(a) Draw the free-body diagram of the man. (3%)